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[130.44.146.16]) by smtp.gmail.com with ESMTPSA id g3-20020a0cf843000000b006a0e585dc77sm606452qvo.70.2024.04.30.13.54.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 30 Apr 2024 13:54:49 -0700 (PDT) Message-ID: Date: Tue, 30 Apr 2024 16:54:47 -0400 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v14 03/26] c++: Implement __is_volatile built-in trait To: Ken Matsui , gcc-patches@gcc.gnu.org Cc: libstdc++@gcc.gnu.org References: <20240221093616.4001742-1-kmatsui@gcc.gnu.org> <20240228192843.188979-1-kmatsui@gcc.gnu.org> <20240228192843.188979-4-kmatsui@gcc.gnu.org> From: Jason Merrill In-Reply-To: <20240228192843.188979-4-kmatsui@gcc.gnu.org> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-12.7 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,GIT_PATCH_0,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On 2/28/24 11:26, Ken Matsui wrote: > This patch implements built-in trait for std::is_volatile. OK. > gcc/cp/ChangeLog: > > * cp-trait.def: Define __is_volatile. > * constraint.cc (diagnose_trait_expr): Handle CPTK_IS_VOLATILE. > * semantics.cc (trait_expr_value): Likewise. > (finish_trait_expr): Likewise. > > gcc/testsuite/ChangeLog: > > * g++.dg/ext/has-builtin-1.C: Test existence of __is_volatile. > * g++.dg/ext/is_volatile.C: New test. > > Signed-off-by: Ken Matsui > --- > gcc/cp/constraint.cc | 3 +++ > gcc/cp/cp-trait.def | 1 + > gcc/cp/semantics.cc | 4 ++++ > gcc/testsuite/g++.dg/ext/has-builtin-1.C | 3 +++ > gcc/testsuite/g++.dg/ext/is_volatile.C | 20 ++++++++++++++++++++ > 5 files changed, 31 insertions(+) > create mode 100644 gcc/testsuite/g++.dg/ext/is_volatile.C > > diff --git a/gcc/cp/constraint.cc b/gcc/cp/constraint.cc > index f32a1c78d63..9a7a12629e7 100644 > --- a/gcc/cp/constraint.cc > +++ b/gcc/cp/constraint.cc > @@ -3861,6 +3861,9 @@ diagnose_trait_expr (tree expr, tree args) > case CPTK_IS_UNION: > inform (loc, " %qT is not a union", t1); > break; > + case CPTK_IS_VOLATILE: > + inform (loc, " %qT is not a volatile type", t1); > + break; > case CPTK_REF_CONSTRUCTS_FROM_TEMPORARY: > inform (loc, " %qT is not a reference that binds to a temporary " > "object of type %qT (direct-initialization)", t1, t2); > diff --git a/gcc/cp/cp-trait.def b/gcc/cp/cp-trait.def > index 36faed9c0b3..e9347453829 100644 > --- a/gcc/cp/cp-trait.def > +++ b/gcc/cp/cp-trait.def > @@ -92,6 +92,7 @@ DEFTRAIT_EXPR (IS_TRIVIALLY_ASSIGNABLE, "__is_trivially_assignable", 2) > DEFTRAIT_EXPR (IS_TRIVIALLY_CONSTRUCTIBLE, "__is_trivially_constructible", -1) > DEFTRAIT_EXPR (IS_TRIVIALLY_COPYABLE, "__is_trivially_copyable", 1) > DEFTRAIT_EXPR (IS_UNION, "__is_union", 1) > +DEFTRAIT_EXPR (IS_VOLATILE, "__is_volatile", 1) > DEFTRAIT_EXPR (REF_CONSTRUCTS_FROM_TEMPORARY, "__reference_constructs_from_temporary", 2) > DEFTRAIT_EXPR (REF_CONVERTS_FROM_TEMPORARY, "__reference_converts_from_temporary", 2) > DEFTRAIT_TYPE (REMOVE_CV, "__remove_cv", 1) > diff --git a/gcc/cp/semantics.cc b/gcc/cp/semantics.cc > index 0d08900492b..41c25f43d27 100644 > --- a/gcc/cp/semantics.cc > +++ b/gcc/cp/semantics.cc > @@ -12532,6 +12532,9 @@ trait_expr_value (cp_trait_kind kind, tree type1, tree type2) > case CPTK_IS_UNION: > return type_code1 == UNION_TYPE; > > + case CPTK_IS_VOLATILE: > + return CP_TYPE_VOLATILE_P (type1); > + > case CPTK_REF_CONSTRUCTS_FROM_TEMPORARY: > return ref_xes_from_temporary (type1, type2, /*direct_init=*/true); > > @@ -12702,6 +12705,7 @@ finish_trait_expr (location_t loc, cp_trait_kind kind, tree type1, tree type2) > case CPTK_IS_SAME: > case CPTK_IS_SCOPED_ENUM: > case CPTK_IS_UNION: > + case CPTK_IS_VOLATILE: > break; > > case CPTK_IS_LAYOUT_COMPATIBLE: > diff --git a/gcc/testsuite/g++.dg/ext/has-builtin-1.C b/gcc/testsuite/g++.dg/ext/has-builtin-1.C > index e3640faeb96..b2e2f2f694d 100644 > --- a/gcc/testsuite/g++.dg/ext/has-builtin-1.C > +++ b/gcc/testsuite/g++.dg/ext/has-builtin-1.C > @@ -158,6 +158,9 @@ > #if !__has_builtin (__is_union) > # error "__has_builtin (__is_union) failed" > #endif > +#if !__has_builtin (__is_volatile) > +# error "__has_builtin (__is_volatile) failed" > +#endif > #if !__has_builtin (__reference_constructs_from_temporary) > # error "__has_builtin (__reference_constructs_from_temporary) failed" > #endif > diff --git a/gcc/testsuite/g++.dg/ext/is_volatile.C b/gcc/testsuite/g++.dg/ext/is_volatile.C > new file mode 100644 > index 00000000000..80a1cfc880d > --- /dev/null > +++ b/gcc/testsuite/g++.dg/ext/is_volatile.C > @@ -0,0 +1,20 @@ > +// { dg-do compile { target c++11 } } > + > +#define SA(X) static_assert((X),#X) > + > +class ClassType { }; > +using cClassType = const ClassType; > +using vClassType = volatile ClassType; > +using cvClassType = const volatile ClassType; > + > +// Positive tests. > +SA(__is_volatile(volatile int)); > +SA(__is_volatile(const volatile int)); > +SA(__is_volatile(vClassType)); > +SA(__is_volatile(cvClassType)); > + > +// Negative tests. > +SA(!__is_volatile(int)); > +SA(!__is_volatile(const int)); > +SA(!__is_volatile(ClassType)); > +SA(!__is_volatile(cClassType));